St John ambulance was seen attending to the injured officer, who appeared to have hurt his arm. He walked out to a waiting St John vehicle with fellow staff members.
A Hato Hone St John spokesperson told the Herald they received reports of the incident at 7.35pm and responded with one ambulance and a rapid response vehicle.
Two patients in a moderate condition received treatment at the scene and were transported to Auckland City Hospital and Middlemore Hospital respectively.
The scene remains taped off with police guard. Detectives from Auckland City are in attendance speaking to staff involved.
The Herald has approached NZ Police for comment.
A store worker across the road from the liquor store said she heard banging, and saw a man with no shirt on who was distressed.
“Police rushed in and we heard smashing noises like glass breaking,” she said.
Another witness said it sounded like bottles were being thrown or broken inside the store.
Nearby business owner David Dewani said he saw about 10 police vehicles as well as an ambulance in attendance.
“By the time I came you guys were already here but I can see the damage and it seems to be painful,” Dewani said.